`media-query-fns` is a lightweight JavaScript/TypeScript library that parses, evaluates and human‑reads CSS media queries. It provides functions such as `compileQuery`, `matches` and `toEnglishString` to turn query strings into objects, test them against custom viewport/device environments, and generate plain‑English descriptions. The package is aimed at front‑end developers who need programmatic, spec‑compliant handling of media queries in Node or browser code.